Other NXP ProductsのトピックRe: Problem with ADC for 56F8037

Problem with ADC for 56F8037

Krtektor — Wed, 17 Dec 2008 03:35:16 GMT

Hi.
I made an interface for control of electric drives but for sensing current i needed reference volteges Ureflo=1.65V and Urefh=3.3V. However, the ADC doesnt operate correctly for this configuration. Can anybody help me?

Re: Problem with ADC for 56F8037

jag — Wed, 04 Feb 2009 21:52:31 GMT

Hi,

you have to connect the two references at the right pins (for example at Vrefha and Vrefla). Then you have to set the right bits in the CAL register or the ADC.

Please check the 56F8037 datasheet and the 56F803X Peripheral Reference Manual for details.

Hope this helps.

Bye Jack

Re: Problem with ADC for 56F8037

Deeftepo — Wed, 15 Jul 2009 03:50:58 GMT

Hi.

I´m need use external reference voltages for de ADC. I´m using CodeWarrior and de EVM, the code generated look fine, but all mesures are 0.

...

setReg(ADC_CAL,0x3000);

Thanks.